<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<div id="leftmenu">
    <a>学生列表</a>
</div>
<style type="text/css">
    #leftmenu {
        float: left;
        width: 20%;
        background: coral;
        height: 600px;
        text-align: center;
    }
</style>